Standardize usage of virtual/override/final specifiers.

ui/app_list/demo/app_list_demo_views.cc

Index: ui/app_list/demo/app_list_demo_views.cc
diff --git a/ui/app_list/demo/app_list_demo_views.cc b/ui/app_list/demo/app_list_demo_views.cc
index b87885ae51084dedc26970a6dc29c9f07ff16b12..89cb92612bcb1cacc7c7500e951b78bdf2905132 100644
--- a/ui/app_list/demo/app_list_demo_views.cc
+++ b/ui/app_list/demo/app_list_demo_views.cc
@@ -34,14 +34,14 @@ class DemoAppListViewDelegate : public app_list::test::AppListTestViewDelegate {
  public:
   explicit DemoAppListViewDelegate(content::BrowserContext* browser_context)
       : view_(NULL), browser_context_(browser_context) {}
-  virtual ~DemoAppListViewDelegate() {}
+  ~DemoAppListViewDelegate() override {}
 
   app_list::AppListView* InitView(gfx::NativeWindow window_context);
 
   // Overridden from AppListViewDelegate:
-  virtual void Dismiss() override;
-  virtual void ViewClosing() override;
-  virtual views::View* CreateStartPageWebView(const gfx::Size& size) override;
+  void Dismiss() override;
+  void ViewClosing() override;
+  views::View* CreateStartPageWebView(const gfx::Size& size) override;
 
  private:
   app_list::AppListView* view_;  // Weak. Owns this.